diff --git a/CHANGELOG.md b/CHANGELOG.md
index 11975ba885..7c548847bf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+## 12.1.0 (Feature release)
+
 ### New features
 
 - [#1328: Update to GOV.UK Frontend 4.1.0](https://github.com/alphagov/govuk-prototype-kit/pull/1328)
diff --git a/VERSION.txt b/VERSION.txt
index f0ad792595..77903b35f3 100644
--- a/VERSION.txt
+++ b/VERSION.txt
@@ -1 +1 @@
-12.0.4
+12.1.0
diff --git a/package-lock.json b/package-lock.json
index 96c3c04923..9d4e0c21a3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "govuk-prototype-kit",
-  "version": "12.0.4",
+  "version": "12.1.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "govuk-prototype-kit",
-      "version": "12.0.4",
+      "version": "12.1.0",
       "dependencies": {
         "acorn": "^8.5.0",
         "ansi-colors": "^4.1.1",
diff --git a/package.json b/package.json
index f8963a5a5d..31ecda9c4c 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "govuk-prototype-kit",
   "description": "Rapidly create HTML prototypes of GOV.UK services",
-  "version": "12.0.4",
+  "version": "12.1.0",
   "private": true,
   "engines": {
     "node": ">=12.0.0 <17.0.0"